Wrapping machine



June 2, 1931. E HAAS WRAPPING MACHINE F'led Aug. 22, 192B 3 Sheets-Sheet l L MQ 1 H W /,N m fr/ m ,W 7 f \\\\\v /.,..|||.U\\\\\\\ N ,0 ---R x m\ 5. l Q o .iHH |11W H N I I R mw b. QM \m\ m www wh i@ w M0 o: Qmn Om m Q@ www i.. N www QQ. mm .Q x@ 0&5 um @FN RM. mm mn QW 'June 2, 1931. E. HAAS WRAPPING MACHINE Filed Aug. 22. 1928 v3 sheets-sheet 2 l i1m ENT ATTORNEY E. HAAS June 2, 1931.

WRAPPING MACHINE 's sheets-sheet 3 Filed Aug. 22, 1928 Patented June 2, 1931 UNITED STATES PATENT OFFICE EDWARD HAAS, 0F BROOKLYN, NEW YORK, ASSIGNOR TO PACKAGE MACHINERY COM- PANY, OF SPRINGFIELD, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS WRAPPING MACHINE Application' led August 22, 1928. Serial No. 301,222.

The invention relates to an improvement in wrapping machines, and more particularly to an improvement in machines for wrapping lollypops, a confection consisting of an irregularly shaped piece of candy with a stick embedded at one end therein to ail'ord the consumer convenient means for holding `the confection.

The present invention is specifically an' improvement upon the twisting mechanism of the lollypop wrapping machine shown and described in my Patent No. 1,530,171, dated March 17, 1925. The wrapping machine of that patent is provided with means for folding a wrapper about the four sides and the top or front end of the candy portion of the lollypop, with the rear ends of the wrapper extending along the stick; and with means for twisting the rearwardly extending ends of the wrapper about the stick at the base of the candy portion of the lollypop to thereby securely hold it in position. If the wrapping paper is of the proper quality, the twisting of the rear loose ends ofthe Wrapper about the stick of the lollypop will be suflicient to cause the wrapper toremain in position on the lollypop and protect the candy portion thereof. But wrapping paper of the proper quality is relative-ly expensive and it has been proposed to use a cheaper but sti'er kind.

It has been found, however, that if the cheaper and stiffer kind of paper is used it will untwist and unfold within a short time after the wrapping operation and fall olf from the lollypop. Accordingly, one ofthe objects of the present invention is to provide a lollypop wrapping machine with improved means for twisting the rear loose ends of the wrapper about the stick of the lollypop, whereby heat may be applied to the wrapper during the twisting operation so as to melt the paraliine with which the paper is impregnated to cause it to iow into the folds of the twist and thereby hold the twisted portion of the wrapper securely in position when the lollypop is discharged from the machine. Other objects of the invention are to rearrange the other 'parts of the twisting mechanism to cooperate with the improved 50 twisting devices so as to secure greater and more eicient production. To these ends the invention consists in the improved twisting mechanism for wrapping machines hereinafter fully described and particularly pointed out in the appended claims.

In the accompanying drawings illustrating the preferred form of the invention, Fig. 1 isa front side elevation of the improved wrapper twisting mechanism as applied to the discharge end of the wrapper folding devices of the machine illustrated and described in my said patent; Fig. 2 is a section taken on the line 2--2of Fig. 1 and shows the twisting fingers in open position; Fig. 3 is an end elevation on a reduced scale and partly in section, looking from the right in Fig. 1; Fig. 4 is a top plan of the parts shown in Fig. l, with certain of the actuating parts broken away; Fig. 5 is a longitudinal section through the middle part of the frame for supporting the various operating parts of the twisting mechanism; Fig. 6 is a transverse section, partly in elevation, through the parts shown in Fig. 1; Fig. 7 is a top plan of the middle portion of the fra-me for supporting the operating parts of the twisting mechanism; and Fig. 8 is a perspective view of a completely wrapped lollypop.

As described in said patent, when the lollypop emerges from between the folding plates 10 of the folding devices, the wrapper is folded about the sides and front or top end of the head or candy portion 9.of the lollypop, with the free ends 11 of the wrapper eXtendin rearwardly and substantially parallelly wit the stick portion 12 of the lollypop. In this condition the partially wrapped lollypop is ready for the twisting operation by which the loose, rearwardly extending ends 11 of the wrapper are twisted about the stick 12 at the point where it joins 4the candy portion of the lollypop, as indicated at 13 in Fig. 8. The means for advancing the lollypop through the wrapper folding means and for holding it in position to be received in the wrapper twisting mechanism may be of any usual or preferred form, it simply being necessary that the carrier means be so constructed as to hold the lollypops by the stick ortion thereof and pernnt the lollypops to e disengaged ing the twisting lingers.

' by a lateral movement on a horizontal plane.

The wrappertwistingmechanism comprises a pair of clamping jaws 15 for holding and turning the lollypop on its longitudinal axis, and a pair of wrapper twisting lingers 17, 18 for holding the loose ends of the wrapper while the lollypop is turning on its longitudinal axis to thereby twist the loose ends of the wrapper about the stick. The clamping jaws and twisting ingers and the parts for supporting them are in duplicate and accordingly it will only be necessary to describe one set of each of these parts. Only a single mea-ns, however, is provided Jfor actuating the clamping jaws and another single means for actuat- The clamping jaws 15 are shovel-shaped to grasp the wide sides of the head or candy portion of the lollypop and are supported on the outer ends of a pair of arms 2O secured in the knuckles 21 pivotally mounted at 22 on the outer end of a head 24 journaled in a rotatable frame 25 which supports all of the operating parts of the wrapper twisting mechanism. The inwardly extending arms 26 of the knuckles 21 are articulated together by a pin and slot connection 27 so that the clamping jaws may move together into either closed or open positions. The clamping jaws are moved toward each other to close upon the head of a lollypop by means of a spring 28 bearing at one end upon the arms 26 of the knuckles 21 and at the other end upon the cross part 29 of a housing 3() secured to the head 24. The clamping jaws are moved apart upon the completion of the twisting operation by means of a pin 31 slidingly mounted in the head 24. rl`he pin 31 is pushed against the arms 26 of the knuckles 21 by means of the wedge-shaped lower end 32 of a verticallyn arranged rod 33 slidingly supported in the frame 25 and in the boss 34 of a bracket 35 supported from the end part 36 of the frame of the wrapping machine. The upperend of the rod 33 carries a collar 40 losely engaged by the bifurcated forward end of the arm 37. of a bell crank pivoted at 38 on the bracket 35. The other arm 39 of the bell crank is connected by the link 40 with an actuating cam, which isindicated at 178 in said patent.

Immediately afterl the kclamping jaws 15 have closed upon the head or candy portion 9 of the lollypop the twisting fingers 17 and 18 are brought together upon the loose rearwardly extending ends 11 of the wrapper at the point where the stick 12 joins the head 9 of the lollypop, this point being indicated at 13 in Fig. 8. When the frame 25 comes to rest momentarily to permit the clamping jaws 15 then in receiving position to receive a lollypop from the folding devices the clampin jaws 15 are so positioned that thelollypopwil be received and held on a substantially horizontal plane with the loose ends 11 of the wrapper extending rearwardly in a substantially horizontal plane. In order to twist the loose ends 11 of the wrapper tightly about the stick at the base of the head 9 of the lollypop the twisting fingers 17 and 18 are arranged to close parallelly upon the loose ends 11 of the wrapper. The twisting of the wrapper is facilitated and a better twist is secured by providing each twisting linger 17 and 18 with a ish tail-shaped part 42 adapted to close upon and engage the wrapper. The lower twisting linger 17 is mounted on the end of a rod 43 which is journaled at its inner end in the bosses 44 formed on the frame l25. The upper twisting finger 18 is mounted on the outer end of a rod 45 journaled at its inner end in the bosses 46 formed on the frame 25 immediately above the bosses 44.

Y The rods 43 and 45 are rocked simultaneously in opposite directions to close the fingers 17 and 18 upon the wrapper and to release the lollypop upon the completion of the twisting operation. For this purpose the inner ends of the rods 43 and 45 are provided with the intermeshing gears 47, and the rod 45 is provided with a segmental gear 48 which meshes with a rack 49 slidingly mounted in the part 50 of the frame 25. The outer end of the rack 49 carries on its upper side a roll 52 held against the periphery of the cam 53 by means of a spring 54. The rack 49 is in duplicate and the two racks with their rolls 52 are oppositely disposed so that the rolls 52 engage with diametrically opposed points on l the periphery of the cam 53. The spring 54 is connected at one end with one rack 49 and at the other end with the other rack, and the construction is such that each rack with its associated parts may move independently of the other, the spring 54 serving to hold the rolls 52 constantly in contact with the cam 53. Consequently each pair of twisting fingers 17 and 18 may be operated independently of the other. The condition of each pair of twisting lingers is controlled by the radial distance of the point on the periphery of the cam 53 with which its roll 52 is in contact.

The cam 53 is a disk-like member provided with a hub portion 56 which is loosely mounted on the rod 33. At its middle point the cam 53 rests upon the boss 57 formed on the upper side of the part 50 of the frame 25. The cam 53 is held in operative Aposition by means of the cam 59 mounted on the shaft 60 (corresponding to the shaft 176 of said patent). `In

engagement with the periphery of the cam 59 is a roll 61 carried by an arm 62, the bifurcated end 63 of which straddles the shaft 60. The arm 62 is pivotally connected with the lower end of a lever 64 pivoted at 65 on the bracket 35. The upper arm of the lever 64 is pivotally connected by the link 66 with an arm 67 fixed to the hub 56 of the cam 53. A spring 68 holds the roll 61 in contact with the periphery of the cam 59 and thereby holds the cam 53 in operative position.

' The twisting of the loose ends 11 of the wrapper about the stick 12 is effected by .rotating the clamping jaws 15 while the twist? ing fingers 17 and 18 are held closed against the stick 12 at the point 13. The inner end of the rotatable head 24 is provided with a beveled gear 70 which meshes with a beveled gear 71 mounted on the upper end of avertically arranged shaft 72 journaled in the lower part 73 of the frame 25 and in the part 36 of the frame of the wrapping machine. The shaft 72 is actuated in timed relation with the other moving parts of the machine, as described in said patent.

The turning of the lollypop on its longitudinal axis to cause the fingers 17 and 18 to twist the ends 11 of the wrapper about the stick is performed while the frame 25 is rotating on its vertical axis to move the clamping jaws 15 and the parts associated with them from the position in which the lollypop is received by the clamping jaws from the folding devices into the position in which the completely wrapped lollypop is discharged from the clamping jaws. The means for turning the frame 25 and the parts carried by it consists of a gear loosely mounted on the vertical shaft 72 and fixed to the lower end of the hub-like part- 73 of the frame 25. The gear 75 is driven by a gear 76 mounted on the upper end of a vertically arranged shaft 77 journaled in the machine frame 36. The shaft 77 may be driven from any convenient source of power, or as described in said patent, in timed relation with the shaft 72 and the'shaft 60.

To heat the loose ends 11 of the wrapper to cause the parafline to melt and run into the folds of the twist and thereby prevent the folds from untwisting when the lollypop is discharged from the machine, the lower twisting finger 17 is provided with an electrical resistance coil, as indicated diagrammatically at 79 in Fig. 2. The resistance coil 79 is supplied with electricity through the wires 8O and 81 which pass from the 'coil 79 to the bottom of a block-82 of insulating material secured at its lower end to the frame 25. The wires 8O and 81 pass upwardly through the block 82. At its upper end the wire 8O connets with a contact spring 83 and the wire 81 connects with the contact spring 84. The contact springs 83 and 84 are secured to the upper end of the' block 82 and-at their free\ ends enga e with the contact rings 85 and 86, respective mounted on a collar of insulating material 87 encircling the hub 56 of the cam 53. A plate 88 of insulating material` is interposed between the collar 87 and the upper surface of the cam 53. VThe contact rings 85 and 86 are supplied with current from its source through the wires 90 and 91. The wire 90 is connected with a terminal post 92 embedded in the collar of insulating material 87. At its lower end the terminal post 92 is connect'ed by means of a pin 93 (Fig. 6) with the contact ring 86. In like manner the terminal post 94 with which the wire 91 is connected' is embedded in the vcollar 87 and connects through a pin with the contact ring 85.

The mode of operation of the improved wrapper twisting mechanism is as follows As the`rotatable frame 25 comes to rest with the clamping jaws and twistin fingers in alinement with the wrapper folding devices the latter push a lollypop into position to be engaged by the pair of clamping aws 15 then in receiving position. As the head or candy portion 9 of the lollypop is moved forward by the wrapping devices into position between the two open clamping jaws 15, the rod 33 is moved upwardly to disengage the wedge-shaped end 32 thereof from the inner end .of the pin 31, thereby permitting the spring 28 to close the jaws 15 upon the head of the lollypop. Immediately thereafter the cam 59 imparts a short clockwise movement to the cam 53 to shift the cam 53 from the position indicated in Fig. 7 to the position shown in Fig. 4 so as to permit the spring 54 to move the rack 49 and roll 52 associated with the parts about to operateon the lollypop inwardly to the low part 96 of the cam 53 to close the twisting fingers 17 and v18 upon the wrapper, as indicated in Figs. 1 and 4l As soon as the twisting fingers 17 and 18 have closed upon the loose ends 11 of the wrapper the frame 25 begins toturn in a `counter-clockwise direction, and at the same time the clamping jaws 15 are rotated to turn the lollypop on its longitudinal axis to effect the twisting of the loose ends 11 of the wrapper about the stick 12 by means of the fingers 17 and 18. The twisting fingers 17 and 18 remain closed upon the ends 11 of the wrapper until the roll 52 arrives at the point 97 of the cam 53. While the parts in engagement with the lollypops are traveling through this arc the clamping jaws 15 turn through substantially two and one-half revolutions, this being sucient to cause the ends 11 of the wrapper to be twisted securely about the stick 12 of the lollypop by means ofthe heated fingers 17 and 18. As the roll 52 travels up the rise 98 of the cam 53 it and the rack 49 are moved outwardly, thereby rocking the segmental gear 48 and causing the twisting lingers 17 and 18 to be disengaged from the twisted end 13 of the wrapper. The rod. 33 is l'then moved downwardly to cause the-pin 31 to act upon the knuckles 21 to open the clamping jaws 15 and vdischarge the lollypop from the machine. As the clamping jaws 99 and twisting fingers 100 (Fig. 4) which have just discharged the completely wrapped lollypop from the machine move towards alinement lll* with the wrapper folding devices the clamp- `ing jaws 99 are closed (since they work in gradually approach each other. rlhen when the clamping jaws 99 and the fingers 100 are in position opposite the discharge end of the folding devices and have received a freshly wrapped lollypop from them and the twisting operation is about to begin, the cam 53 is turned through its short clockwise movement to cause the fingers to close upon the loose ends 11 of the wrapper. As the roll 52 travels toward the point 97 the cam 53 is turned slowly in a counter-clockwise direction to shift it into its normal position, that indi` cated in Fig. 7.

Having thus described the invention, what I claim as new is 1. A. twisting mechanism for wrapping machines comprising, a pair of clamping jaws for holding a wrapped article with the ends of the wrapper extending from the article, a pair of pivotally mounted twisting fingers arranged to engage the ends of the wrapper, means for rotating the clamping jaws to cause the fingers to twist the ends of the wrapper, a rotatable member mounted to turn on a horizontal plane for supporting the clamping jaws and twisting fingers, a movable cam for controlling the closed and open positions of the twisting fingers, a rollin engagement with the working surface ot the cam, connections between the roll and the twisting fingers, and means for imparting a clockwise movement to the cam to cause the fingers to close upon the ends of the wrapper and for returning the cam to its original position after the wrapped `article has been discharged.

2. A twisting mechanism for wrapping machinesfcomprising, a pair of clamping jaws for holding a wrapped article with the ends of the `wrapper extending from the article, a pair of twisting fingers arranged to engage the ends of the wrapper, means for rotating the clamping jaws to cause the fingers to twist the wrapper, a rotatable member arranged to turn on a horizontal lane for supporting the clamping jaws and) twisting fingers, a movable cam for controlling the open and closed positions of the-twisting fingers mounted co-axially with and above the rotatable member, connections between the cam and the twisting fingers, and means for normally holding the cam stationary but moving the cam in one direction prior to the twisting operation and in the opposite direction during the twisting operation.

3. A twisting mechanism for wrapping machines comprising, a pair of clamping jaws for holding a wrapped article with the ends of the wrapper extending romthe article, a pair of twisting fingers arranged to engage with the ends of the wrapper, means for rotating the clamping jaws to cause the fingers to twist the ends of the wrapper, a rotatable member arranged to turn on a horizontal plane for supporting the clamping jaws and the twisting fingers, a resistance coil connected with the twisting fingers for heating the wrapper during the twisting operation, and means for passing a current of electricity through the coil consisting of a pair of contact rings'mounted to be held on a horizontal plane, a pair of Contact strips mounted on the rotatable member and engaging with the contact rings, respectively, connections between the contact strips and the resistance coil, and

connections whereby current may be conj veyed to the contact rings.

4. A twisting mechanism fer wrapping machines comprising, a pair of clamping jaws v for holding a wrapped article with the ends of' the wrapper extending from the article, a' pair of pivotally mounted twisting fingers arranged to engage the ends of the wrapper, means for rotating the clamping jaws to cause the fingers to twist the ends o? the wrapper, a rotatable member arranged to turn on a horizontal plane for supporting the clamping jaws and twisting fingers, a cam for controlling the open and closed positions of the twist.- ing fingers mounted co-axially with and above the rotatable member, a roll supported from the rotatable member arranged to travel around the periphery of the cam, connections between the roll and the twisting fingers, means for moving the cam and for holding it stationa the conditions in opening and closing the twisting fingers with respect to the ends of the wrapper, a resistance coil mounted in one of the fingers, a pair of contact rings mounted on the cam and arranged to be connected with a source of electricity, a pair of contact strips in engagement with the contact rings, respectively, and connections between the Contact stripsand the resistance coil.

EDWARD HAAS.

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